thing and decryption device
The bombe (UK: ) is an electro-mechanical device used by the British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The US Navy and US Army later produced their own machines to the same functional specification, albeit engineered differently both from each other and from Polish and British bombes. The British bombe was a development from a device that had been designed in Poland at the Biuro Szyfrów (Cipher Bureau) by cryptologist Marian Rejewski, known as the "bomba" (Polish: bomba kryptologiczna) who had been breaking German Enigma messages for the previous seven years using it and earlier machines. The initial design of the British bombe was produced in 1939 at the UK Government Code and Cypher School (GC&CS) at Bletchley Park by Alan Turing, with an important refinement devised in 1940 by Gordon Welchman. The engineering design and construction was the work of Harold Keen of the British Tabulating Machine Company. The first bombe, code-named Victory, was installed in March 1940 while the second version, Agnus Dei or Agnes, incorporating Welchman's new design, was working by August 1940. The bombe was designed to discover some of the daily settings of the Enigma machines on the various German military networks: specifically, the set of rotors in use and their positions in the machine; the rotor core start positions for the message—the message key—and one of the wirings of the plugboard.DbPedia
Commemorated on 2 plaques
Engineering Heritage Award The Bombe Bletchley Park Completed in 2007 using the original blueprints. An electromechanical device designed by A Turing, G Welchman and H Keen, used in cracking the German Enigma code during the Second World War. The 200 Bombes built by the British Tabulating Machine Company played a pivotal role in winning the war.
Block B - Bletchley Park , Bletchley, United Kingdom where it designed
IEEE Milestone in Electrical Engineering and Computing Code-breaking at Bletchley Park during World War II, 1939-45. On this site during the 1939-45 World War, 12,000 men and women broke the German Lorenz and Enigma ciphers, as well as Japanese and Italian codes and ciphers. They used innovative mathematical analysis and were assisted by two computing machines developed here by teams led by Alan Turing: the electro-mathematical Bombe developed with Gordon Welchman, and the electronic Colossus designed by Tommy Flowers. These achievements greatly shortened the war, thereby saving countless lives.
Bletchley Park House, Bletchley Park, Bletchley, United Kingdom where it designed